WO2019124762A1 - Appareil de mesure du taux de rebond d'un service de diffusion - Google Patents

Appareil de mesure du taux de rebond d'un service de diffusion Download PDF

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Publication number
WO2019124762A1
WO2019124762A1 PCT/KR2018/014241 KR2018014241W WO2019124762A1 WO 2019124762 A1 WO2019124762 A1 WO 2019124762A1 KR 2018014241 W KR2018014241 W KR 2018014241W WO 2019124762 A1 WO2019124762 A1 WO 2019124762A1
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WIPO (PCT)
Prior art keywords
receiver
channel
channels
threshold value
instruction
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PCT/KR2018/014241
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English (en)
Korean (ko)
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백원장
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애니포인트미디어 주식회사
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Priority to CN201880081649.7A priority Critical patent/CN111602348B/zh
Priority to JP2020533105A priority patent/JP7281823B2/ja
Priority to EP18891395.8A priority patent/EP3731439A4/fr
Publication of WO2019124762A1 publication Critical patent/WO2019124762A1/fr
Priority to US16/894,856 priority patent/US10911169B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2408—Monitoring of the upstream path of the transmission network, e.g. client requests
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H04H20/33—Arrangements for simultaneous broadcast of plural pieces of information by plural channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/29—Arrangements for monitoring broadcast services or broadcast-related services
    • H04H60/33—Arrangements for monitoring the users' behaviour or opinions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25866—Management of end-user data
    • H04N21/25891—Management of end-user data being end-user preferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44204—Monitoring of content usage, e.g. the number of times a movie has been viewed, copied or the amount which has been watched
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44213—Monitoring of end-user related data
    • H04N21/44222—Analytics of user selections, e.g. selection of programs or purchase activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/65—Transmission of management data between client and server
    • H04N21/658—Transmission by the client directed to the server
    • H04N21/6582—Data stored in the client, e.g. viewing habits, hardware capabilities, credit card number
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/812—Monomedia components thereof involving advertisement data

Definitions

  • the present invention relates to a bounce rate measuring apparatus for measuring a bounce rate of a broadcast service.
  • the audience rating of the broadcast service is measured.
  • the broadcasting service provider can use the audience rating as a criterion for grasping the quality such as the satisfaction of the broadcasting service of the viewer who watches the broadcasting service, and the advertiser can use the audience rating .
  • the audience rating is measured, for example, by selecting a sample group uniformly distributed by region, age, sex, and education, and then collecting viewing behavior information for the broadcasting service provided in the sample group.
  • the conventional method for measuring the audience rating is measured for the sample group, it differs from the actual audience rating.
  • a complicated method is used to measure the audience rating, there is a disadvantage that even the audience rating of the sample group can not be accurately measured.
  • Patent Document 1 receives an image of a viewer, creates viewer recognition information on the basis of the received image, and generates viewing behavior information based on the acquired viewer recognition information, thereby more accurately measuring the audience rating .
  • Japanese Patent No. 10-1751708 also uses a complicated method such as registering a viewer in advance in order to measure the audience rating.
  • Bounce rates generally refer to the percentage of people who visit a website but leave the site without accessing another page or obtaining information. More specifically, the bounce rate refers to a rate at which a visitor connects to a start page but leaves without accessing a lower layer page, for example, when the web site has a lower layer page linked to the start page and the start page.
  • a high bounce rate means that a visitor is unlikely to lead to the same behavior as purchasing a product even if the user accesses the website, and a low bounce rate means that the visitor is likely to lead to the same behavior as purchasing the product . Therefore, the bounce rate can be used as a criterion for evaluating the website of the Internet in particular.
  • the bounce rate is a criterion applied to Internet services such as web pages, and is not applicable to broadcast services.
  • a broadcast service is provided in such a manner that contents are continuously provided. Therefore, there is no start page and there is no lower layer page. Therefore, in the broadcast service, the bounce rate applied to the Internet service can not be applied as it is.
  • Patent Document 1 Korean Patent No. 10-1751708.
  • a method for receiving a broadcast service from a first receiver to an n-th receiver (where n is a natural number of 2 or more) A first instruction for receiving first service providing information to nth service providing information each including at least a detail provided by at least one of a predetermined one of the plurality of channels through the first receiver and the nth receiver; And a controller for analyzing the first service providing information to the n-th service providing information to determine whether the one or more channels are provided for a predetermined period of time based on the number of times the one or more channels are provided for the time period exceeding the first threshold value through the first receiver or the n- And determines, for the predetermined period of time, the one or more channels through the first receiver to the n < th > receiver based on the number of times provided for a time equal to or greater than the first threshold value and equal to or less than the second threshold value, A second instruction for determining the number of times to be taken; And
  • a bounce rate measuring apparatus that measures a bounce rate of a broadcast service using service provision information generated based on a behavior of a viewer selecting a channel and then leaving the channel. For example, measure a bounce rate associated with a particular channel of a broadcast service, measure a bounce rate associated with a particular receiver, or measure a bounce rate associated with a particular content served through a broadcast service. Also, based on the measured bounce rates of the broadcast service, it is possible to evaluate the quality of the broadcast service more efficiently and grasp the viewer's interest.
  • the bounce rate measured according to the present invention can be used alone or as a criterion for evaluating the quality of a broadcast service or for grasping a viewer's interest, in combination with an existing audience rating.
  • FIG. 1 is a block diagram showing an exemplary configuration of a bounce rate measuring apparatus according to the present invention
  • FIG. 2 is a diagram showing a system environment in which a bounce rate measuring apparatus according to the present invention is executed.
  • FIG 3 is a view exemplarily showing knitting information in the bounce rate measuring apparatus according to the present invention.
  • FIG. 4 is an exemplary block diagram of a program stored and executed by the bounce rate measuring apparatus according to the present invention.
  • FIG. 5 illustrates a process of selecting a channel and leaving a channel in a receiver
  • FIGS. 6 to 8 illustrate service provision information generated according to the process shown in FIG. 5.
  • FIG. 1 is a block diagram showing an exemplary configuration of a bounce rate measuring apparatus according to the present invention.
  • a bounce rate measuring apparatus 100 includes at least one processor 110, at least one memory 130, at least one memory 130 and at least one processor 110 And one or more programs 150 configured to execute.
  • the one or more processors 110 read and execute one or more programs 150 stored in the one or more memory 130.
  • One or more processors 110 are shown for example x (where x is a natural number), but may be, for example, one or more. That is, a single processor may be used to execute the function of the BOM device 100, or a plurality of processors may be interlocked to execute the functions of the BOM device 100.
  • the first processor may execute the arithmetic function and the second processor may execute the function of the bounce rate measuring apparatus 100 by using the manner in which the second processor executes the communication function.
  • the one or more memories 130 store the programs 150.
  • the one or more memories 130 are, for example, recording media such as nonvolatile memories or volatile memories which are writable and readable.
  • One or more memories 130 are shown as one but may be plural.
  • One or more programs 150 are shown, for example, in y (where y is a natural number), but may be, for example, one or more. That is, the function of the BOM device 100 may be implemented using one program, or a plurality of programs may be interlocked to implement the function of the BOM device 100. [ For example, the functions of the bounce rate measuring apparatus 100 may be implemented in such a manner that the first program implements the arithmetic function and the second program implements the communication function.
  • processors 110 one or more processors 110, one or more memories 130 and one or more programs 150 are referred to as “processor 110", “memory 130” and “program 150”, respectively.
  • FIG. 2 is a diagram showing a system environment in which the BIC measurement apparatus according to the present invention is implemented
  • FIG. 3 is a diagram exemplarily showing channel and program information of a broadcast service in the BIC measurement apparatus according to the present invention.
  • the system environment in which the bounce rate measuring apparatus according to the present invention is implemented includes a bounce rate measuring apparatus 100 and first to eighth receivers 200-1 to 200-n, n is a natural number of 2 or more).
  • the bounce rate measuring apparatus 100 is a device for measuring the bounce rate of a broadcast service.
  • the bounce rate measurement apparatus 100 may be a part of a broadcast service system that provides a broadcast service, but may be implemented separately from the broadcast service system.
  • the bounce rate measuring apparatus 100 may be connected to the first receiver 200-1 through the nth receiver 200-n through a broadcasting / communication network to transmit and receive data.
  • the first receiver 200-1 to the nth receiver 200-n may be any one of a set-top box, a television, a personal computer, and a mobile communication terminal having a computing function, for example, receiving and providing digital broadcasting.
  • digital broadcasting refers to a broadcasting service in the form of digital terrestrial broadcasting, digital cable broadcasting, digital satellite broadcasting, DMB broadcasting, IP-TV, OTT (over the top) and VOD broadcasting.
  • the first to n < th > receivers 200-1 to 200-n are configured to transmit and receive data to and from the bounce rate measuring device 100, .
  • n can be appropriately determined on the basis of the number of receivers that the bounce rate measuring apparatus 100 designates to measure the bounce rate. For example, if the bounce rate measuring device 100 measures the bounce rate associated with all receivers subscribed to the broadcast service system, then n may be the total number of receivers subscribed to the broadcast service system. Also, for example, if the bounce rate measuring device 100 measures the bounce rate associated with a particular group of receivers among the subscribers of the broadcast service system, then n may be the number of receivers of a particular group. The particular group may be determined based on parameters such as, for example, the area, the capabilities of the receiver, the rate plan, and the age of the subscriber.
  • the arrangement information includes contents provided through a channel and time at which the contents are provided.
  • m can be appropriately determined on the basis of the number of channels designated by the bounce rate measuring apparatus 100 for measuring the bounce rate.
  • m may be the total number of channels of the broadcast service.
  • m may be the number of channels of a particular group.
  • the programming information for the first channel 300-1 is configured to provide, for example, a first content, a first advertisement, a second content, a second advertisement, and a third content in order, (300-m) is configured to sequentially provide, for example, the fourth content, the third advertisement, the fifth content, the fourth advertisement, and the first content, and the programming information for the m-
  • the programming information for the first channel 300-1 through the m-th channel 300-m may be configured to provide the first content.
  • the combination information for the first channel 300-1 to the m-th channel 300-m is configured to provide the first content, the bounce rate information related to the content to be described later can be extracted.
  • bounce rate is defined and used as data for evaluating the quality of a broadcast service.
  • the bounce rate is defined as follows.
  • the bounce rate related to the channel is set to a specific one of the first channel 300-1 to the m-th channel 300-m, that is, the i-th channel (i is a natural number of 1 or more and m or less) And is calculated on the basis of the details provided through the nth receiver 200-n.
  • the predetermined period is a period for confirming the return rate such as one day, one week, or one month.
  • the first threshold value is a value determined in consideration of the delay time from when the first receiver 200-1 to the nth receiver 200-n receives the user input for selecting the i-th channel, to be. For example, it may take a predetermined time until the first receiver 200-1 receives the user input for selecting the i-th channel, for example, the channel 11, and then processes the channel 11 for signal processing. Also, in order to select a desired channel, the viewer may change the channel by pressing the channel up button instead of the channel number.
  • the first threshold value is determined in consideration of this time. For example, the first threshold value may be 3 seconds.
  • the second threshold value is a value dynamically determined based on the identification information of the i-th channel.
  • the second threshold value is a value dynamically selected from among the plurality of threshold values based on the identification information of the i-th channel, and may be changed according to the characteristics of the channel or the characteristics of the content broadcasted on the channel.
  • the second threshold value may be determined differently, for example, 10 seconds for the i-th channel, 20 seconds for the movie channel, and 30 seconds for the home shopping channel.
  • the second threshold value indicates a time required for the viewer to confirm whether the content is provided after selecting the i-th channel and determine whether to continue watching or to watch another channel. That is, the second threshold value means a time required for the viewer to select whether to watch the i-th channel while excluding channel zapping.
  • the bounce rate associated with the i-th channel is expressed as follows.
  • BR identification information of the i < th > channel, period start point, period end point, first threshold value, second threshold value
  • BR (Channel 11, November 1, 2017, 00:00:00, November 30, 2017, 23:59:59, 3 seconds, 10 seconds) is the bounce rate associated with channel 11,
  • the first threshold value is set to 3 seconds and the second threshold value is set to 10 seconds in 1 month from November 1, 00:00:00 to November 30, 2013, 23:59:59.
  • the bounce rate related to the channel of the receiver is a specific one of the first channel 300-1 to the m-th channel 300-m, that is, the i-th channel (i is a natural number of 1 or more and m or less) (J is a natural number equal to or greater than 1 and equal to or smaller than n) of the n-th receiver 200-n to the n-th receiver 200-n.
  • the bounce rate associated with the i-th channel of the j-th receiver is expressed as follows.
  • BR identification information of the i-th channel, identification information of the j-th receiver, period start point, period end point, first threshold value, second threshold value
  • BR channel 11, identification information of the first receiver, 00:00:00 on November 1, 2013, 23:59:59 on November 30, 2017, 3 seconds, 10 seconds
  • the first threshold value is set to 3 seconds in one month from 00:00:00 on November 1, 2017 to 23:59:59 on November 30, 2017, as the bounce rate associated with channel 11 of the terminal 200-1
  • the second threshold value is 10 seconds.
  • the bounce rate associated with the content is calculated on the basis of the details provided by the first receiver 200-1 through the nth receiver 200-n.
  • the bounce rate associated with the content can be calculated from a point in time when the viewer selects the content, for example, from a point in time when the corresponding content is selected through channel switching. That is, since the bounce rate is measured based on the case where the viewer switches the channel, the bounce rate is measured based on, for example, a case where the viewer watches the corresponding content without switching to a specific channel, Or when other contents are being broadcasted, it may be excluded when measuring the bounce rate.
  • the bounce rate related to the content can be defined as shown in Equation (4).
  • the first receiver 200-1 to the n-th receiver 200-n is selected at a time point when the first channel 300-1 to the m-th channel 300-m of the first receiver 200-1 to the nth receiver 200- (The number of times provided from the first channel 300-1 to the m-th channel 300-m over the first threshold value and less than the second threshold value) / M to the m-th channel 300-m from the time point when the first to third channels 300-1 to 300-m of the n-th receiver -1 to the n-th receiver 200- ) Over the first threshold)
  • the bounce rate related to the content is expressed as follows.
  • BR identification information of contents, time period, end point of period, first threshold value, second threshold value
  • BR identification information of the first content, 00:00:00 on November 1, 2013, 23:59:59 on November 30, 2017, 3 seconds, 10 seconds
  • the bounce rate related to the channel of the content is calculated on the basis of the details provided by the first receiver 200-1 through the nth receiver 200-n through a specific channel, for example, the i-th channel.
  • the content is transmitted from the first receiver 200-1 to the nth receiver 200-n through the i-th channel for a predetermined period of time, which is equal to or higher than a first threshold value and equal to or lower than a second threshold value / (The total number of times the content has been provided for a time equal to or greater than the first threshold value through the i-th channel in the first receiver 200-1 through the nth receiver 200-n for a predetermined period of time)
  • the bounce rate related to the channel of the content may be calculated from the time when the viewer switches to the specific channel and selects the corresponding content. That is, since the bounce rate is measured based on the case where the viewer switches the channel, the bounce rate is measured based on, for example, a case where the viewer watches the corresponding content without switching to a specific channel, Or when other contents are being broadcasted, it may be excluded when measuring the bounce rate.
  • the bounce rate related to the content can be defined as shown in Equation (6).
  • the content is transmitted from the first receiver 200-1 to the nth receiver 200-n through the i-th channel from the time when the i-th channel is selected for a predetermined period of time) (The number of times provided for a time equal to or less than the first threshold value and equal to or less than the second threshold value) / (the content is transmitted from the first receiver 200-1 to the nth receiver 200- The total number of times provided for a time greater than or equal to the first threshold)
  • the bounce rate related to the i-th channel of the content is expressed as follows.
  • BR identification information of content, identification information of the i-th channel, period viewpoint, period end point, first threshold value, second threshold value
  • the first threshold value is set to 3 seconds in a month from 00:00:00 on November 1, 2017 to 23:59:59 on November 30, 2017, The threshold is set to 10 seconds, which indicates the measured return rate.
  • the bounce rate associated with the receiver of the content is determined by the fact that a particular content is transmitted to a specific receiver among the first receiver 200-1 through the nth receiver 200-n, that is, the history provided through the jth receiver (j is a natural number equal to or greater than 1 and equal to or smaller than n) .
  • the bounce rate related to the channel of the content may be calculated from the time when the viewer switches to the specific channel and selects the corresponding content. That is, since the bounce rate is measured based on the case where the viewer switches the channel, the bounce rate is measured based on, for example, a case where the viewer watches the corresponding content without switching to a specific channel, Or when other contents are being broadcasted, it may be excluded when measuring the bounce rate.
  • the bounce rate related to the content may be defined as shown in Equation 8.
  • the first channel 300-1 to the m-th channel 300-m are selected in the j-th receiver for a predetermined period of time) (The number of times provided over the m-th channel 300-m for a time equal to or greater than the first threshold value and equal to or less than the second threshold value) / (the content is transmitted from the first receiver 200-1 to the nth receiver 200- n through the first channel 300-1 through the m-th channel 300-m from the time when the first channel 300-1 through the m-th channel 300-m are selected, The total number of times provided)
  • the bounce rate associated with the j < th > receiver of the content is expressed as follows.
  • BR identification information of content, identification information of a j-th receiver, period viewpoint, period end point, first threshold value, second threshold value
  • BR first content, identification information of the first receiver, 00:00:00 on November 1, 2013, 23:59:59 on November 30, 2017, 3 seconds, 10 seconds
  • the first threshold value is set to 3 seconds in one month from 00:00:00 on November 1, 2017 to 23:59:59 on November 30, 2017, as the bounce rate related to the first content of the content 200-1
  • the second threshold value is 10 seconds.
  • the BR identification information of content, identification information of a j-th receiver, period of time, end point of a period, first threshold value, second threshold value
  • BR identification information of content, The first threshold value, and the second threshold value
  • the bounce rate associated with the receiver and channel of the content is determined based on whether or not a specific content is received from a specific one of the first receiver 200-1 through the nth receiver 200-n, that is, the jth receiver (where j is a natural number equal to or greater than 1 and equal to or smaller than n) (I is a natural number equal to or greater than 1 and equal to or smaller than m) on a specific channel among the first to third channels 300-1 to 300-m.
  • the bounce rate related to the channel of the content may be calculated from the time when the viewer switches to the specific channel and selects the corresponding content. That is, since the bounce rate is measured based on the case where the viewer switches the channel, the bounce rate is measured based on, for example, a case where the viewer watches the corresponding content without switching to a specific channel, Or when other contents are being broadcasted, it may be excluded when measuring the bounce rate.
  • the bounce rate associated with the content may be defined as in Equation 10.
  • the content is transmitted over the i-th channel from the time when the i-th channel is selected in the j-th receiver for the predetermined period to the j-th receiver and the i-th channel)
  • the bounce rate associated with the j-th receiver and the i-th channel of the content will be expressed as follows.
  • BR identification information of content, identification information of an i-th channel, identification information of a j-th receiver, periodic time, termination end point, first threshold value, second threshold value
  • BR first content, channel 11, identification information of the first receiver, 00:00:00 on November 1, 2013, 23:59:59 on November 30, 2017, 3 seconds, 10 seconds
  • the first threshold value is set to 3 seconds
  • the second threshold value is set to 10 seconds.
  • BR content identification information, identification information of an i-th channel, identification information of a j-th receiver, period viewpoint, end point of a period, first threshold value, second threshold value
  • I-th channel identification information, j-th receiver identification information, first threshold value, second threshold value I-th channel identification information, j-th receiver identification information, first threshold value, second threshold value
  • the bounce rate measuring apparatus 100 may transmit, for example, a first threshold value and a second threshold value to the first receiver 200-1 through the nth receiver 200-n. Also, the first receiver 200-1 to the nth receiver 200-n generate the first service provision information to the nth service provision information based on the first threshold value and the second threshold value, 100, respectively. Also, the bounce rate measuring apparatus 100 may further transmit identification information of the i-th channel or identification information of contents to the first receiver 200-1 through the n-th receiver 200-n, for example.
  • the first receiver 200-1 to the nth receiver 200-n receive the first service providing information through the n-th receiver 200-n on the basis of the identification information of the i-th channel or the identification information of the content and the first threshold value and the second threshold value,
  • the service providing information may be generated and transmitted to the bounce rate measuring apparatus 100, respectively.
  • FIG. 4 is an exemplary block diagram of a program stored and executed by the bounce rate measuring apparatus according to the present invention.
  • the program 150 includes a first instruction 150-1 to a third instruction 150-3.
  • the program 150 may further include at least one of the fourth instruction 150-4 to the ninth instruction 150-9.
  • the second instruction 150-2 may include a first sub-instruction 150-2-1 and a second sub-instruction 150-2-2.
  • the fourth instruction 150-4 may include a third sub-instruction 150-4-1 and a fourth sub-instruction 150-4-2.
  • the sixth instruction 150-6 may include a fifth sub-instruction 150-6-1 and a sixth sub-instruction 150-6-2.
  • the eighth instruction 150-8 may include seventh sub-instructions 150-8-1 and eighth sub-instructions 150-8-2.
  • the first instruction 150-1 includes a first channel 300-1 to an m-th channel 300-1 of the broadcast service from the first receiver 200-1 to the nth receiver 200- N-th service providing information including at least the details of one or more channels preset by the first receiver 200-1 through the n-th receiver 200-n among the plurality of channels 300- Respectively.
  • the at least one channel may be, for example, a designated i-th channel among the first to m-th channels (where i is a natural number of 1 or more and m or less).
  • the one or more channels may be, for example, two or more channels specified among the first channel to the m-th channel.
  • the first instruction 150-1 receives the first service provision information from the first receiver 200-1 and the nth service provision information from the nth receiver 200-n.
  • the first service providing information to the n-th service providing information will be described in more detail with reference to FIGS. 5 to 8.
  • FIG. 5 The first service providing information to the n-th service providing information will be described in more detail with reference to FIGS. 5 to 8.
  • channel 11 is designated as the i-th channel in the first receiver 200-1
  • user inputs for selecting at least channel 11 and user inputs for departing from channel 11 The process of generating the first service provision information is explained. Since the other service providing information, e.g., the n-th service providing information, can also be generated in the n-th receiver 200-n similarly to the first service providing information, description of the process of generating other service providing information will be omitted.
  • FIG. 5 is a diagram illustrating a process of selecting a channel in a receiver and leaving a channel.
  • the first receiver 200-1 receives a user input for selecting channel 11 through a remote controller, for example, at 7:15:5 AM (S110). Then, the first receiver 200-1 receives the user input for selecting the channel 9 through the remote controller, for example, at 7:15:24 AM (S120). Then, the first receiver 200-1 receives the user input for selecting the channel 7 through the remote controller, for example, at 7:25:17 AM (S130). Thereafter, the first receiver 200-1 receives the user input for selecting the channel 11 again, for example, through the remote controller at 7:50:23 AM (S140). Thereafter, the first receiver 200-1 receives a user input for selecting the channel 13 again, for example, through the remote controller at 7:50:25 AM (S150).
  • the first receiver 200-1 receives a user input for selecting the channel 11 again, for example, through the remote controller at 8: 5: 10 seconds (S160). Then, the first receiver 200-1 receives the user input, for example, to turn off the power through the remote controller at 8:59:30 AM (S170).
  • 6 to 8 are views illustrating exemplary service provision information generated according to the process shown in FIG.
  • the first service provision information is illustratively shown.
  • the first service provision information may include identification information (first receiver ID) of the first receiver 200-1, identification information of the channel, and time at which the event occurred via the remote controller.
  • the first service provision information includes "channel 11, AM 7:15 minutes 5 seconds", “channel 9, AM 7:15 minutes 24 seconds” 7:25:17 “,” Channel 11, AM 7:50:23 “,” Channel 13, AM 7:50:25 “,” Channel 11, AM 8:05:10 " "End, AM 8: 5: 30 seconds ".
  • the first receiver 200-1 generates first service provision information based on all user inputs to change or departure of a channel, and transmits the first service provision information to the BMS 100 according to the present invention .
  • the first service provision information is generated based on all user inputs to change or departure of the channel, the data size of the first service provision information becomes large. Therefore, when the first service provision information is transmitted to the BIS device 100, the communication load and the calculation load of the first receiver 200-1 may occur.
  • the bounce rate measuring apparatus 100 also has a disadvantage in that it is required to perform calculations based on all user inputs for channel change or departure.
  • the first service provision information includes the identification information of the first receiver 200-1, the identification information of the i-th channel, the time when the first receiver 200-1 receives the user input for selecting the i-th channel, It can be simplified to include the time at which the receiver 200-1 receives the user input leaving the i-th channel.
  • the first receiver 200-1 provides the first service based on the user input for selecting the channel 11 and the user input for departing from the channel 11 Information.
  • the user input for departing from channel 11 includes the case of the power button input shown in step S170, that is, the end.
  • the first service provision information includes identification information (first receiver ID) of the first receiver 200-1, identification information of the i-th channel (channel 11)
  • the time when the user input for selecting the channel 11 is received and the time when the first receiver 200-1 receives the user input for departing from the channel 11 is "AM 7:15:05, AM 7:15:24 "," AM 7:50:23 AM 7:50:25 AM "and” AM 8:05:10 AM AM 8:05:30 AM ".
  • the first service provision information includes identification information (first receiver ID) of the first receiver 200-1, identification information of the i-th channel (channel 11), channel 11
  • the time and the difference value at which a user input for selecting channel 11 is received is shown in FIG. 8 as "AM 7:15:05, 19 seconds "," AM 7:50:23, 8: 5: 10, 20 ".
  • the difference value means the time, i.e., the duration, of channel 11 provided by the first receiver 200-1.
  • the first receiver 200-1 may generate the first service provision information based on the first threshold and the second threshold.
  • the first receiver 200-1 transmits the first service providing information only when the i-th channel, for example, the channel 11 is provided for 3 seconds or more in the first receiver 200-1 Lt; / RTI >
  • the second instruction 150-2 analyzes the first service providing information through the nth service providing information received through the first instruction 150-1,
  • the first receiver 200-1 through the nth receiver 200-n determine the first number based on the number of times provided for the time equal to or longer than the first threshold value, Determines a second number of times based on the number of times provided for a time equal to or greater than the first threshold value and equal to or less than the second threshold value through the first receiver 200-1 through the nth receiver 200-n.
  • the first number and the second number are values for extracting the bounce rate information related to one or more channels in the third instruction 150-3 described later.
  • the first number of times may be the number of times that the one or more channels described above are provided for a time equal to or greater than the first threshold value through the first receiver 200-1 through the nth receiver 200-n, for a predetermined period.
  • the second number may be set to a predetermined number of times, for example, for a predetermined period of time, such that the one or more channels described above are transmitted through the first receiver 200-1 through the nth receiver 200- The number of times can be used as is.
  • the bounce rate information related to the i-th channel it is preferable to exclude the case where the advertisement information is provided through the i- . That is, when the advertisement information is provided, the viewer mostly changes the channel to another channel without continuously viewing the channel.
  • the second instruction 150-2 may include a first sub-instruction 150-2-1 and a second sub-instruction 150-2-2.
  • the first sub-instruction 150-2-1 includes a first sub-instruction 150-2-1 for a predetermined period of time in which one or more of the channels described above are transmitted through the first receiver 200-1 to the n-th receiver 200- Mentioned one or more channels determined by comparing the first service providing information to the n-th service providing information with the combination information for one or more of the above-mentioned channels among the first receiver 200-1 through the nth receiver 200-n ) Excluding the number of times provided for the time period exceeding the first threshold value during the period in which the advertisement information is organized on the one or more channels in the predetermined period.
  • advertisement information is provided from the i-th channel, for example, channel 11, for 2 seconds from 7:50:23, if channel 11 is provided for 2 seconds from 7:50:23 AM It is excluded when calculating the first number.
  • advertisement information is provided when the first channel is provided.
  • the second sub-instruction 150-2-2 may be configured such that the one or more channels described above are transmitted through the first receiver 200-1 through the nth receiver 200-n for a predetermined period of time to a first threshold value,
  • the above-mentioned one or more channels among the number of times provided for a period of time equal to or less than the value are transmitted through the first receiver 200-1 to the nth receiver 200-n during a period in which the advertisement information is organized in the above-
  • the second number of times may be determined excluding the number of times provided for a time equal to or longer than the first threshold value and equal to or shorter than the second threshold value.
  • the bounce rate information related to the above-mentioned one or more channels for example, the bounce rate information related to the i-th channel can be extracted more accurately have.
  • the third instruction 150-3 extracts the bounce rate information associated with one or more of the channels described above based on the first and second times determined through the second instruction 150-2. For example, if one or more of the channels described above is the i-th channel, the third instruction 150-3 extracts the bounce rate information related to the i-th channel.
  • the bounce rate information associated with one or more channels includes the ratio of the second number of times to the first number.
  • the bounce rate information related to one or more channels may further include at least one of a first number, information on a predetermined period, and identification information of one or more channels.
  • the reason that the bounce rate information associated with one or more channels includes the first number is to extract the visit frequency for the one or more channels described above based on the number of times the viewer selected the one or more channels.
  • the reason that the bounce rate information related to one or more channels includes information on a predetermined period and identification information of one or more channels is that the bounce rate measuring apparatus 100 transmits bounce rate information related to one or more channels to another external apparatus In order to identify the period and the target channel from which the bounce rate information related to one or more channels is extracted.
  • BR channel identification information, period viewpoint, period end point, first threshold value, second threshold value
  • the identification information of the first threshold, the second threshold, the time period, the end point, and the channel may be changed to extract the bounce rate information related to the desired channel for the desired thresholds and the desired period.
  • the bounce rate associated with the i < th > channel can be used, for example, as an index for evaluating the viewer's loyalty to the i < th > That is, if the bounce rate is low even if the audience rate of the i-th channel is low, the i-th channel may mean that the audience loyalty is high. On the contrary, if the bounce rate is high even if the audience rate of the i-th channel is high, the i-th channel may mean that the viewer's loyalty is low.
  • the above-described first embodiment has been described on the basis of extracting the bounce rate information related to the i-th channel. That is, the first to (n-1) th receiver 200-1 to the (n-1) th receiver 200-n.
  • the program 150 may further include a fourth instruction 150-4 and a fifth instruction 150-5.
  • the fourth instruction 150-4 analyzes the j-th service provision information (where j is a natural number equal to or greater than 1 and equal to or less than n) among the first service provision information to the n-th service provision information, Determines a third number of times based on the number of times provided for a time equal to or longer than the first threshold value through the j-th receiver of the first receiver 200-1 through the nth receiver 200-n, N through the n < th > receiver 200-1 to the n < th > receiver 200-n on the basis of the number of times provided for a time equal to or greater than the first threshold value and equal to or less than the second threshold value.
  • the above-mentioned one or more channels may be, for example, a designated i-th channel among the first to m-th channels (where i is a natural number of 1 or more and m or less).
  • the one or more channels may be, for example, two or more channels specified among the first channel to the m-th channel.
  • the third number and the fourth number are values for extracting the bounce rate information related to one or more channels in the fifth instruction 150-5 described later.
  • the third number of times for example, one or more of the channels described above for the predetermined period, is used as it is for the time exceeding the first threshold value through the j receiver of the first receiver 200-1 through the nth receiver 200-n .
  • the fourth number of times may be, for example, one or more of the above-described one or more channels for a predetermined period of time provided through the first receiver 200-1 to the nth receiver 200-n for a time equal to or longer than the first threshold value and less than the second threshold value The number of times can be used as is.
  • the third and fourth times are determined to extract the bounce rate information related to the one or more channels of the j-th receiver. It is preferable to exclude cases where information is provided. That is, when the advertisement information is provided, the viewer mostly changes the channel to another channel without continuously viewing the channel.
  • the fourth instruction 150-4 may include a third sub-instruction 150-4-1 and a fourth sub-instruction 150-4-2.
  • the third sub-instruction 150-4-1 may be configured to transmit the j-th service providing information and the above-mentioned one or more channels among the number of times that the one or more channels described above are provided for a time equal to or longer than the first threshold value through the j- Except for the number of times provided for the time period over the first threshold value during the period in which the above-mentioned one or more channels determined by comparing the programming information is organized in one or more of the above- Determine the number of times.
  • the fourth sub-instruction 150-4-2 may be configured so that one or more of the channels described above for a predefined period of time, among the number of times provided for one or more of the channels above the first threshold and below the second threshold, The fourth number of times is determined excluding the number of times provided for the time period over which the advertisement information is organized in the one or more channels in the predetermined period through the j < th > receiver during the period in which the advertisement information is organized over the first threshold value and below the second threshold value.
  • the bounce rate information associated with the aforementioned one or more channels of the j-th receiver e.g., associated with the i-th channel of the j-
  • the bounce rate information can be extracted more accurately.
  • the fifth instruction 150-5 includes bounce rate information related to the aforementioned one or more channels of the j-th receiver based on the third and fourth times determined through the fourth instruction 150-4 . For example, if the aforementioned one or more channels are the i-th channel, the fifth instruction 150-5 extracts the bounce rate information related to the i-th channel of the j-th receiver.
  • the bounce rate information associated with said one or more channels of the j < th > receiver includes a ratio of fourth to third times.
  • the bounce rate information related to the one or more channels of the j-th receiver may further include at least one of a third number, information on a predetermined period, identification information of the j-th receiver, and identification information of the one or more channels.
  • the BR (identification information of the channel, identification information of the receiver, period viewpoint, period end point, first threshold value, second threshold value) Can be extracted through the instruction 150-5.
  • the first threshold, the second threshold and the identification information of the channel, the identification information of the receiver, the time period, the end point of the period, and the identification information of the receiver You can also extract for a desired period.
  • the bounce rate associated with the i < th > channel of the j < th > receiver may be used, for example, as an index to evaluate the viewer's loyalty of the j < th > That is, even if the audience rate of the i-th channel is low, if the bounce rate associated with the i-th channel of the j-th receiver is low, the viewer of the j-th receiver may mean that the loyalty is high for the i-th channel.
  • the bounce rate associated with the i-th channel of the j-th receiver is high even if the audience rate of the i-th channel is high, the viewer of the j-th receiver may mean that the loyalty is low for the i-th channel.
  • the above-described first embodiment has been described on the basis of extracting the bounce rate information related to the i-th channel. That is, the first to (n-1) th receiver 200-1 to the (n-1) th receiver 200-n.
  • the program 150 may further include a sixth instruction 150-6 and a seventh instruction 150-7.
  • the sixth instruction 150-6 analyzes the program information for the one or more channels and the first service providing information to the nth service providing information to determine whether the predetermined content is in the first and second channels, Determines a fifth number of times based on the number of times provided for a time equal to or longer than the first threshold value through the receiver 200-1 through the nth receiver 200-n, and determines that the above- And determines the sixth number based on the number of times provided for the time that is equal to or greater than the first threshold value and equal to or less than the second threshold value through the first receiver 200-1 through the nth receiver 200-n.
  • the above-mentioned one or more channels may be, for example, a designated i-th channel among the first to m-th channels (where i is a natural number of 1 or more and m or less).
  • the one or more channels may be, for example, two or more channels specified among the first channel to the m-th channel.
  • the seventh instruction 150-7 extracts the bounce rate information related to the aforementioned one or more channels of the above-described contents based on the fifth and sixth times extracted through the sixth instruction 150-6. For example, if the aforementioned one or more channels are the i-th channel, the seventh instruction 150-7 extracts the bounce rate information related to the i-th channel of the above-mentioned contents.
  • the bounce rate information associated with said one or more channels of content includes a ratio of sixth to fifth.
  • the bounce rate information related to the one or more channels of the content may further include at least one of a fifth number, information on a predetermined period, identification information on the content, and identification information on the one or more channels.
  • the bounce rate information related to the one or more channels of the content may be calculated from the time when the viewer switches to a specific channel and selects the corresponding content. That is, since the bounce rate is measured based on the case where the viewer switches the channel, the bounce rate is measured based on, for example, a case where the viewer watches the corresponding content without switching to a specific channel, Or when other contents are being broadcasted, it may be excluded when measuring the bounce rate.
  • the sixth instruction 150-6 may include a fifth sub-instruction 150-6-1 and a sixth sub-instruction 150-6-2.
  • the fifth sub-instruction 150-6-1 is configured to transmit a predetermined content to the first receiver 200-1 through the n-th receiver 200-n from a point in time when the one or more channels described above are selected, And determines a fifth number of times based on the number of times provided for the time equal to or longer than the first threshold value through the channels.
  • the sixth sub-instruction 150-6-2 is a sub-instruction to be transmitted from the first receiver 200-1 to the n-th receiver 200-n from a point in time when the one or more channels described above are selected, And determines a sixth number of times based on the number of times provided for the time equal to or greater than the first threshold value and equal to or less than the second threshold value.
  • BR identification information of a content, a time period, a termination end point, a first threshold value, and a second threshold value
  • BR includes a first instruction 150-1, a sixth instruction 150-6 to a seventh instruction 150-7 ).
  • the BR identification information of contents, identification information of a channel, a time period, a termination end point, a first threshold value, a second threshold value
  • the BR is determined based on the first instruction 150-1, the sixth instruction 150-6, May be extracted via instruction 150-7.
  • the identification information of the contents, the identification information of the i-th channel, the time period, the end point of the period, the first threshold value, the second threshold value is the first instruction 150-1, , And sixth instruction 150-6 through seventh instruction 150-7.
  • the bounce rate information related to the desired channel of the desired content is extracted You may.
  • the bounce rate associated with the i-th channel of the content can be used, for example, as an index for evaluating the viewer's loyalty of the i-th channel to the content. That is, even if the audience rate of the i-th channel is low, if the bounce rate associated with the i-th channel of the content is low, it may mean that the viewer of the i-th channel has high loyalty to the content. On the contrary, even if the audience rate of the i-th channel is high, if the bounce rate related to the i-th channel of the content is high, it may mean that the viewer of the i-th channel has low loyalty to the content.
  • the above-described third embodiment has been described on the basis of extracting bounce rate information related to the above-mentioned one or more channels of specific contents.
  • the program 150 may further include an eighth instruction 150-8 and a ninth instruction 150-9.
  • the eighth instruction 150-8 analyzes the j-th service provision information among the first service provision information and the n-th service provision information, and determines that the predetermined content is transmitted to the first receiver 200-1 through the n < th > Determines a seventh number of times based on the number of times provided for a time equal to or greater than the first threshold value through the one or more channels described above at the j-th receiver of the receiver 200-n, And determines the eighth number based on the number of times provided over the one or more channels over the first threshold value and less than the second threshold value.
  • the ninth instruction 150-9 extracts the j-th receiver of the above-described contents and the bounce rate information related to the above-mentioned one or more channels based on the seventh and eighth times determined through the eighth instruction 150-8 . For example, if the above-mentioned one or more channels are the i-th channel, the ninth instruction 150-9 extracts the bounce rate information related to the j-th receiver and the i-th channel of the above-mentioned contents.
  • the bounce rate information associated with the j < th > receiver of the content and the one or more channels described above comprises a ratio of eighth to seventh times.
  • the bounce rate information related to the j < th > receiver of the contents and the at least one channel described above may be at least one of the seventh number, information on a predetermined period, identification information of the content, identification information of the j- As shown in FIG.
  • the bounce rate information related to the j-th receiver of the content and the one or more channels described above may be calculated from the time when the viewer switches from the j-th receiver to the one or more channels and selects the corresponding content. That is, since the bounce rate is measured based on the case where the viewer switches the channel, the bounce rate is measured based on, for example, a case where the viewer watches the corresponding content without switching to a specific channel, Or when other contents are being broadcasted, it may be excluded when measuring the bounce rate.
  • the eighth instruction 150-8 may include seventh sub-instructions 150-8-1 and eighth sub-instructions 150-8-2.
  • the seventh sub-instruction 150-8-1 determines whether or not one or more of the channels described above are selected at the j-th receiver of the first receiver 200-1 through the n-th receiver 200-n
  • the seventh number of times is determined based on the number of times provided for the time equal to or greater than the first threshold value through the one or more channels described above.
  • the eighth sub-instruction 150-8-2 is configured so that the predetermined content for a predetermined period of time is equal to or greater than the first threshold value through the one or more channels described above from the point in time when the one or more channels described in the j-
  • the eighth number of times is determined based on the number of times provided for the following time.
  • the BR (identification information of content, identification information of the j-th receiver, period viewpoint, period end point, first threshold value, second threshold value) is the first instruction 150-1, the eighth instruction 150-8 Can be extracted through the ninth instruction 150-9. That is, when one or more channels include both the first channel 300-1 to the m-th channel 300-m, the BR (identification information of the content, identification information of the j-th receiver, The threshold value, and the second threshold value) may be extracted through the first instruction 150-1, the eighth instruction 150-8, and the ninth instruction 150-9.
  • the BR identification information of content, identification information of an i-th channel, identification information of a j-th receiver, period viewpoint, endpoint period, first threshold value, second threshold value
  • the BR identification information of content, identification information of an i-th channel, identification information of a j-th receiver, period viewpoint, endpoint period, first threshold value, second threshold value
  • the BR identification information of content, identification information of an i-th channel, identification information of a j-th receiver, periodic time, termination end point, first threshold value, 1 instruction 150-1, the eighth instruction 150-8 through the ninth instruction 150-9.
  • the bounce rate information related to the desired receiver and the desired channel of the desired content to a desired threshold value by changing the first threshold value, the second threshold value, the identification information of the content, the identification information of the channel, You can also extract the values and the desired duration.
  • the bounce rate associated with the j < th > receiver and the i < th > channel of the content may be used as an index for evaluating the viewer's loyalty of the i < th > That is, even if the audience rate of the i-th channel is low, if the bounce rate related to the j-th receiver and the i-th channel of the content is low, the viewer of the i-th channel in the j-th receiver may mean that the loyalty is high for the content.
  • the audience rate of the i-th channel is high, if the bounce rate associated with the j-th receiver and the i-th channel of the content is high, it may mean that the viewer of the i-th channel in the j-th receiver is low in loyalty to the content.
  • a bounce rate measuring apparatus that measures a bounce rate of a broadcast service using service provision information generated based on a behavior of a viewer selecting a channel and then leaving the channel. For example, measure a bounce rate associated with a particular channel of a broadcast service, measure a bounce rate associated with a particular receiver, or measure a bounce rate associated with a particular content served through a broadcast service. Also, based on the measured bounce rates of the broadcast service, it is possible to evaluate the quality of the broadcast service more efficiently and grasp the viewer's interest.
  • the bounce rate measured according to the present invention can be used alone or as a criterion for evaluating the quality of a broadcast service or for grasping a viewer's interest, in combination with an existing audience rating.
  • a bounce rate measuring apparatus that measures a bounce rate of a broadcast service using service provision information generated based on a behavior of a viewer selecting a channel and then leaving the channel. For example, measure a bounce rate associated with a particular channel of a broadcast service, measure a bounce rate associated with a particular receiver, or measure a bounce rate associated with a particular content served through a broadcast service. Also, based on the measured bounce rates of the broadcast service, it is possible to evaluate the quality of the broadcast service more efficiently and grasp the viewer's interest.
  • the bounce rate measured according to the present invention can be used alone or as a criterion for evaluating the quality of a broadcast service or for grasping a viewer's interest, in combination with an existing audience rating.

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Abstract

Selon la présente invention, un appareil de mesure du taux de rebond peut être utilisé pour mesurer un taux de rebond d'un service de diffusion en utilisant des informations de fourniture de service générées sur la base d'une action d'un spectateur sélectionnant une chaîne, puis changeant de chaîne. Par exemple, il est possible de mesurer un taux de rebond associé à une chaîne spécifique d'un service de diffusion, de mesurer un taux de rebond associé à un récepteur spécifique, ou de mesurer un taux de rebond associé à un contenu spécifique fourni par le service de diffusion. En outre, sur la base des taux de rebonds mesurés du service de diffusion, il est possible d'évaluer la qualité du service de diffusion ou de saisir plus efficacement l'intérêt du spectateur.
PCT/KR2018/014241 2017-12-18 2018-11-20 Appareil de mesure du taux de rebond d'un service de diffusion WO2019124762A1 (fr)

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CN201880081649.7A CN111602348B (zh) 2017-12-18 2018-11-20 广播业务的跳出率测量装置
JP2020533105A JP7281823B2 (ja) 2017-12-18 2018-11-20 放送サービスの返送率測定装置
EP18891395.8A EP3731439A4 (fr) 2017-12-18 2018-11-20 Appareil de mesure du taux de rebond d'un service de diffusion
US16/894,856 US10911169B2 (en) 2017-12-18 2020-06-07 Bounce rate measuring apparatus for broadcasting service

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KR1020170173750A KR102081221B1 (ko) 2017-12-18 2017-12-18 방송 서비스의 반송률 측정 장치

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KR102066465B1 (ko) * 2018-10-16 2020-01-15 애니포인트미디어 주식회사 홈쇼핑 방송 제공 장치 및 홈쇼핑 방송 제공 방법
KR102079002B1 (ko) * 2018-10-16 2020-02-19 애니포인트미디어 주식회사 홈쇼핑 방송 제공 장치 및 홈쇼핑 방송 제공 방법

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KR102081221B1 (ko) 2020-02-25
CN111602348A (zh) 2020-08-28
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EP3731439A4 (fr) 2021-09-08
KR20190072731A (ko) 2019-06-26
US20200304222A1 (en) 2020-09-24
EP3731439A1 (fr) 2020-10-28
CN111602348B (zh) 2022-02-25
US10911169B2 (en) 2021-02-02

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